Fourth to david wilson



(No Model.)

J. B. MAHAPPEY.

' CUTTER HEAD.

No. 363,753. Patented May 24, 1887.

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*UNITED STATES PATENT OFFICE.

J AMFS B. MAHAFFEY, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE- FOURTH TODAVID XVILSON AND FIB'EN B. HUNTING, BOTH OF SAME PLACE.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 363,753, dated May 24,1857.

Application filed November 30, 1856.. Serial No. 220,253.

To aZZ whom it may concern:

Be it known that I, JAMES B. llIAHAFFEY, a citizen of the United States,residing at Baltimore, in the State of Maryland, havein vented certainnew and useful Improvements in Outter-Heads for Flooring-Machines, ofwhich the following is a specification.

The improvedcutter-head which is the subject of this invention isemployed in planing and matching machines to produce from one board twotongued boards, such as are com monly used for flooring, ceiling, andWainscoting, and is an improvement 011 the cutter-head shown and claimedby mein Patent No 321,378, of date June 30, 1885.

In the drawings herewith, which illustrate the invention, Figure 1 is aperspective view of the improved cutter'head. Fig. 2 is a view of one ofthe blades for cutting two tongues as it appears when separated from thehead. Fig. 3 is a view showing the'inclined sharpening-face ofatongue-cutter blade. Fig. 4 is a cross-section of a board, and shows theposition of two tongues formed on a board by the tongue-cutter as saidtongues would appear previous to separation by the dividing-blade.

The body A of the cutter-head has an eye, I), for the mandrel or shaft,(not shown,) to which latter the cutter-head is to be secured in anywell-known manner. The body has four projecting rectangular sides, twoof which are diametrically opposite each other, and are designated bythe letter 0, and the other two, which are also diametrically oppositeeach other and between the two first mentioned, are designated by theletter (Z. A right-angled notch, e, is between and separates each of thesides 0 from the adjacent side, cZ. Each side 0 d has on its peripheraledge a straight blade-groove, f, which extends in a line with the planeof rotation, and each side is also provided with transverse holes 9 forthe bolts 71, by which the blades are secured.

Each tongue-cutter I is designed to cut one side of two wood tongues.This cutter consists of a straight body having one side attached to aflange, 70, which is provided with bolt-holes h. NVhen the tonguecutterI is attached to the body A, the flange 7r, which serves as a shank,occupies a groove, f, in one (No model.)

of the projecting sides 0. On its peripheral side the tongue-cutter hasa straight central bead, Z, and each of the remaining two sides of thebody has a longitudinal angular swell or bulge, m.

The letter a designates the two cuttingedges, which are in line witheach other, and cut away the wood to form the tongue, which lat terhas aslightly-inclined face, as shown in Fig. 4, This cutting-edge is formedby the beveled or inclined sharpeuiugface n, and the end of the centralbead, Z, forms a rabbet-cutter, Z. By applying this inclined face to agrinder or stone the tongue-cutter may be sharpened. Each tongue-cutterhas two cutting-edges, n, and a central rabbeter, Z, divides orseparates these two edges. The rabbeter unites with each cutting-edge aby an inward curve, a". Vhen the cutter is cutting the wood to form thetwo tongues o, the rabbeter Z forms in the wood a groove, 19, (see Fig.4,) where the said two tongues are to be separated; and, it will beseen, the said inward curves n produce in the wood rounded corners oredges p where the groove is formed. Thus when the tongues are separatedalong the groove 19 they will have a smooth and rounded edge.

An important feature in thetongue-cutter is the angular side swells orbulges, m. These produce on the sharpeningfacen, at each side of thecuttingedges a, a spreading edge, q, and then from the broadest part ofthe bulge m a contracting edge, 1".

In operation cutting-edges at three sides of the tongue-cutter act onthe woodthe edge a and the two side spread edges q. It will be noticedas the board is fed to the cutter the edges n and rabbets Z first strikethe board; but as the cutter revolves and the board is fed to the samethe edgesq of the cutter are brought in contact with the board, so theopening is enlarged to the width of the cutter at m; and, owing to therotary action of the cutter in connection with the longitudinal feed ofthe board, the sides of the openings are so brought in contact with thecutters that the said sides are slightly inclined to the bottom thereof.By having the two side edges 1 to spread away from the cutting-edge a,as shown, the cutter clears itself in the wood on its upturn, and byhaving the contracting edge 0" all choking and burning of the tool isavoided. These are important results.

Two tonguecutters, I, and two dividingblades, S, are employed. Inoperation, the dividing-blades out along the groove 1), which is formedby the rabbet-eutters Z, and thus divide the one board into two tonguedboards.

Having described my invention, I claim and desire to secure by LettersPatent of the United States- An improved cutter-head having theprojections (1 d and c c on opposite sides thereof, with grooves f ontheir peripheral edges and openingsg in their sides, and provided withtongue- JAMES B. MAHAFFEY.

Witnesses:

J OHN E. MORRIS, JNo. T. MADDOX.

